Table 7–2

NUCLEAR DATA FOR DIFFICULT-TO-MEASURE RADIONUCLIDES

Isotope

Half Life (years)

Radiation Emitted

Principal Means of Production

Nuclides Origin

H-3

12.3

Beta

Fission; Li-7 (n,nα); B-10 (n,2α); H-2 (n,γ)

Fuel & Coolant

C-14

5730

Beta

N-14 (n,p), 0–17 (n,α)

Fuel & Coolant

Fe-55

2.76

x-ray

Fe-54 (n,γ)

In-core surfaces

Ni-63

99.5

Beta

Ni-62 (n,γ)

In-core surfaces

Ni-59

7.5×104

x-ray

Ni-58 (n,γ)

In-core surfaces

Sr-90

28.1

Beta

Fission

Fuel

Tc-99

2.12×105

Beta

Fission; Mo-98 (n,γ) Mo-99 (beta)

Fuel

I-129

1.57×107

Beta, Gamma

Fission

Fuel

TRU*

Variable

Mostly alpha

Multiple n-capture

Fuel

*TRU=Transuranic isotopes, excluding beta emitter Pu-241 and shorter-lived Cm-242



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